Furnace.



No. 839,520. PATENTBD DEG. 25, 1906.

M. VAN'B. SMITH.

PURNAGB.

APPLIOATION FILED IFBB. 28. 1906.

WITNESSES:

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`tral vertical section UNITED STATES PATENT QFFICE.

Specification of Letters Patent.

Patented Dec. 25, 1906.

Application filed February 28, 1906. Serial No. 303,346.

T all whom it may concern.-

Be it known that I, MARTIN VAN BUREN SMITH, a citizen of the United States of America, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Furnaces, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to improvements in furnaces, and particularly to improvements in regenerator-furnaces.

My invention consists in an improved form, construction, and arrangement of parts in a furnace whereby the cost of manufacture thereof is largely reduced and the eiliciency increased.

My invention also consists in certain improvements in the arrangement of aireinlet, gas-inlet, and discharge channels for the products of combustion and in the arrangement and construction of the means for controlling same.

I will describe an embodiment of my invention with reference to the accompanying drawings illustrating same and will then point out the novel features in claims.

In the drawings, Figure 1 is a view in centhrough the furnace. Fig. 2 is a horizontal section therethrough and through the stack for receiving the products of combustion after the heat thereof has been utilized in the furnace. Fig. 3 is a detail view, in verticalsection, through the base of said stack and through portions of the channels connecting therewith. Fig. 4 is a detail sectional view through one of the gasinlet channels. Fig. 5 is a view in horizontal section of a somewhat modified form of furnace.

My improved furnace comprises two substantially D-shaped chambers and 11, in which the usual checker-work 12 of furnaces of this character is disposed, the two chame bers being arranged with their rounded portions facing outwardly in opposite directions, their flat portions forming bridge-walls 13, facing toward each other. The bridge-walls support a hearth 14, and suitable refractory material 15 may be contained in the otherwise unoccupied space between the said walls beneath the hearth. The two chambers are contained within a shell 16, the preferred form of which is cylindrical, as shown in Figs. l and 2 of the drawings. A shell of this description being continuous binds the l parts together without the employment of the expensive binders usually employed in square-end furnaces, and its use results in a furnace of great strength but extreme cheapness.

In Fig. 5 I have shown a similar furnace, except that the hearth being much wider proportionately than is the hearth of Figs. 1 and 2 the shell is necessarily of somewhat elongated form but in this form, as in Fig. 3, the end parts of the shell being rounded to conform to the shape of the D-shaped chambers within them, the shell is similarly continuous and to this extent has some of the advantages of the form shown in Figs. 1 and 2. The form shown in Figs. 1 and 2 is, however, very much the preferred form and isV always employed where possible. The roof to such a furnace comprises a dome 17, which covers the entire furnacei. e., the chambers l0 and 11 and the hearth 14.

Gas-inlet ducts 18 18 connect with channels 19, disposed lengthwise through the bridge-walls 13. These channels open into the upper end of the furnace upon opposite sides ot' the hearth 14, as will be well understood. Connecting with the chambers 10 and 11, at the base thereof and beneath the checker-work 12 contained therein, are ducts or channels 20, which lead to the base of a stack 21. A partition 22 is arranged at the base of the stack, and a tumblerevalve 23, pivoted at 24, is employed to connect the one or other of the channels with the stack 21 at will, in accordance with the position to which it is adjusted. A hand-lever 25 is provided for adjusting the said tumbler-valve- The base of the stack is also provided with air-inlet valves 26 26, arranged beneath the tumbler-valve 23, air being freely admitted to a discharge 20 when its valve 26 is opened. In Fig. 3 I have shown a tumbler-valve 23 as adjusted upon the left-hand side and the air-valve 26 opened upon the same side. A chain 27, loosely hanging from the lever 25, is hooked into the valve 26 to keep same open. I/Vith the parts in this position air will enter the left-hand channel 20, passing down into the chamber 10, up through the said chamber into the proximity of the hearth 14. At this time gas will be admitted through the left-hand duct 1S and channel 19, the air and gas mingling and burning in the combustionchamber 28 at the top of the furnace and imparting heat to the material upon the hearth 14. The spent gases will pass down through IOO IIO

trolling-valves 29 of any desired character -may be employed highest efficiency 'ize substantially through the channel 20, and into the stack the base of each said chambers, to the base 21. In passing out the gases will heat up of saidstack, a tumbler-Valve in said stack the checker-work in the chamber 11 to ahigh l connecting one or other of the said channels degree, and when finally the checker-worl in 1 therewith, and simultaneously closing the the chamber 10 becomes cooled from thel other channel from connection with the action of the cold air passing therethrough stack, and air-inlet valves for the said chanthe foregoing operation maybe reversed, air i nels, opening into the stack at the base being then admitted into the right-hand thereof, beneath the said tumbler-valve. channel 20, up through the hot checker-work 2. A regenerator-furnace comprising two in the chamber 11, and products of combustion discharged down through the colder` checker-work l2 in the chamber 10. Thel temperature of the checker-work in this chamber will be again raised, so that as the tained in the said chambers, a hearth artemperature of the checker-work in the other ranged between the chambers, gas-inlet chanchamber is lowered the operation may be l nels comprising horizontal ducts beneath the continued as at first described and may be furnace and Vertical passages disposed longi alternated, so as to constantly realize the 1 tudinally through the bridge-walls, a stack, a of the furnace and to utilchannel leading from the base of each said all the heat of the gases bechamber to the base of the stack, a tumblerdischarged. Suitable convalve in said stack-base connecting one or the other of said last-named channels with the stack and simultaneously closing the other channel from connection therewith, and air-inlet valves for said channels opening into the stack at the base thereof, beneath the tumbler-valve.

MARTIN VAN BUREN SMITH. Vitnesses:

. NoRwooD B. AYnRs,

D. HOWARD HAYwooD.

the checker-work in the chamber 1,1, out 1 gas-inlet channels, a stack, a channel from l together with their rounded portions oppositely arranged and their straight portions constituting bridge-walls, checker-work confore they are for controlling the incoming gases through the ducts 18, and the said ducts may conveniently merge beyond the said valves into a single duct 30, as will be readily understood.

IVhat I claim isl. A regenerator-furnace comprising two chambers, checker-work contained in the chambers, a hearth between the chambers, 1

substantially D-shaped chambers connected 

